OBD-II code · Powertrain (generic, extended)
P2D1A Exhaust Flow Control Valve C Position Circuit High
The exhaust flow control valve C reports a position circuit high condition. Exhaust routing for back-pressure or noise control on this branch cannot be commanded reliably.
Is it safe to drive with P2D1A?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySignal wire shorted to B+
- PossibleOpen position sensor
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Likely to fail
- Parts involved
- Exhaust Flow Control Valve C, Wiring Harness, Ecm
Related codes
- P2BF7Exhaust Flow Control Valve A Position Circuit High
- P2BFFExhaust Flow Control Valve B Position Circuit High
- P2D17Exhaust Flow Control Valve C Position Circuit
- P2D18Exhaust Flow Control Valve C Position Circuit Range/Performance
- P2D19Exhaust Flow Control Valve C Position Circuit Low
- P2D1BExhaust Flow Control Valve C Position Not Learned
- P2D1CCold Start EGR A/B Ratio Performance
- P2D1DReductant System Leak Detected – Small Leak
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.